Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
  • F02M69/04—Injectors peculiar thereto
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
  • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
  • F02M2200/85—Mounting of fuel injection apparatus
  • F02M2200/852—Mounting of fuel injection apparatus provisions for mounting the fuel injection apparatus in a certain orientation, e.g. markings or notches
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
  • F02M2200/85—Mounting of fuel injection apparatus
  • F02M2200/853—Mounting of fuel injection apparatus involving use of quick-acting mechanism, e.g. clips

Definitions

• the invention relates to an internal combustion engine having an injection valve for direct injection of fuel into a combustion chamber of a cylinder of the internal combustion engine.
• the direct injection of fuel into the combustion chambers of internal combustion engines is increasingly used in motor vehicle construction. Compared with the injection into a suction pipe or into an antechamber of the combustion chamber, direct injection can be used to achieve improved mixture formation and thus optimize combustion in the combustion chamber.
• the direct injection also makes it possible to realize stratified charge, so form mixtures in the combustion chamber having a different air-fuel ratio in different areas of the combustion chamber. This makes it possible to operate the internal combustion engine with excess oxygen at its optimum thermodynamic operating point, which increases the efficiency, in particular in the partial load range. In this way consumption and emissions of the internal combustion engine can be reduced.
• DE 10 2006 019 308 A1 also describes an injection valve for an internal combustion engine. This is held by a prestressed sealing contour on a sealing seat of a receiving bore of the cylinder head.
• Such an internal combustion engine is inventively characterized in that a support member which holds an injection valve in an associated receiving opening of a cylinder head of the internal combustion engine is rotationally rotationally secured by positive engagement of a first positive locking element on the injection valve and by positive engagement of a second positive locking element on the cylinder head.
• the injection valve can thus be reliably held in its desired position, so that the desired Einspritzeigenschaften remain.
• such an indirect rotary safety device can be easily adapted to changes in geometry of the cylinder head or the injection valve. If the geometry of one of the two components mentioned changes, then only the support element has to be adapted in order to ensure a reliable rotational securing of the modified component. This allows a particularly cost-effective adaptation of the type of Injection valve and cylinder head. Also, the use of another type of injectors on the same engine can be easily realized by adjusting the support member without structural changes to the injector or the cylinder head are necessary. This makes it possible, for example, to provide different construction variants of the internal combustion engine without significant investment costs being necessary. Different mounting positions of the same injection valve to the internal combustion engine with different requirements for the mixture formation can be easily realized by appropriately adapted support elements.
• the support element surrounds a shaft region of the injection valve at least partially on the outside.
• Such a support element can be plugged onto the injection valve before assembly of the injection valve, so that the two parts can be kept in stock as a unitary assembly and mounted together.
• the first positive locking element is designed as a receiving opening of the support element, in which engages a connector of the injection valve. Therefore, no specially provided, complementary to the first positive-locking element structures are necessary at the injection valve. Rather, an existing geometric element of the injection valve is used to ensure the rotational position assurance between the positive locking element and the injection valve. This reduces the cost of manufacturing the injectors and can potentially save weight.
• the second form-locking element of the support element is designed as a latching nose, which engages in a mating contour of the cylinder head.
• a form-fitting element is particularly easy to manufacture and does not require elaborate machining on the cylinder head to form the mating contour.
• Such a counter contour can already be produced during the casting of the cylinder head.
• the mating contour is introduced into the cylinder head by machining in the form of a positioning bore. If necessary, necessary minor geometric changes of the mating contour can therefore be realized without changing a casting tool for producing the cylinder head, so that such changes are particularly cost-effective to perform.
• the support element is held under pretension on the injection valve. This ensures a secure fit of the support element on the injection valve, so that the two components can be handled safely as a common assembly without the risk that unintentionally releases the support member from the injector.
• the support element exerts a spring force between the support element and the cylinder head.
• a tension between the injection valve and the cylinder head is realized in the installed state of the support element, which ensures a particularly good positional securing of the injector.
• the invention further relates to a motor vehicle with an internal combustion engine of the type described.
• FIG. 1 is a perspective view of a cylinder head of an embodiment of an internal combustion engine according to the invention with a built-in injection valve;
• FIG. 2 shows a perspective illustration of an injection valve with a support element for use in an exemplary embodiment of an internal combustion engine according to the invention
• Fig. 3 is a plan view of the injection valve with support element according to
• FIG. 4 is a perspective view of a support member for an injection valve for use in an embodiment of an internal combustion engine according to the invention
• FIG. 5 is a sectional view through a cylinder head of an exemplary embodiment of an internal combustion engine according to the invention in the region of an injection valve.
• Fig. 1 shows a perspective view of a section of a cylinder head 10 for an internal combustion engine.
• the cylinder head 10 has a receiving bore 2 for an injection valve 14.
• the injection valve 14, shown separately in perspective in FIG. 2 is inserted into the receiving bore 12 with a shaft region 16 so that it projects with its nozzle end 18 into a combustion chamber of the internal combustion engine.
• fuel can be injected under high pressure into the combustion chamber, which allows improved mixture formation in the combustion chamber.
• the direct injection of fuel enables the generation of different mixture ratios in different regions of the combustion chamber, thereby making it possible to operate the internal combustion engine at its optimal thermodynamic operating point and thus to optimize its efficiency.
• a support element 20 is provided.
• the support element 20 partially surrounds the shaft region 16 of the injection valve 14 on the outside.
• the support element 20 as can be seen particularly well in FIGS. 3 and 4, has a collar-like or bell-shaped base body 22, which can be clamped resiliently to the shaft region 16 of the injection valve 14.
• the main body 22 has a receiving opening 24, which in the installation position of the support member 20 laterally surrounds a connector 26 of the injection valve 4.
• the connector 26 is applied to abutment surfaces 28, 30 of the support member 20, so that the support member 20 is rotationally secured relative to the injection valve 14.
• the sleeve-shaped base body 22 also has gripping elements 32, which allow a simple assembly and disassembly of the support element 20.
• a laterally projecting from the base body 22 locking lug 34 projects in the installed position of the support member 20 in a positioning hole 36 of the cylinder head 10.
• a rotation of the provided with the support member 20 injector 14 relative to the cylinder head 10 is realized. If the relative position between cylinder head 10 and injection valve 14 is to be changed, this can be achieved by a simple adaptation of the geometry of the support element 20, without having to modify expensive casting tools for the cylinder head 10 or for the injection valve 14. Even with geometric changes to the cylinder head 10 or the injection valve 14, the correct positioning of the injection valve 14 can be realized by simple changes of the support member 20. This allows a particularly simple adaptation of the rotational position of the injection valve 14 to changing structural conditions or changed injection conditions.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Cylinder Crankcases Of Internal Combustion Engines (AREA)
• Fuel-Injection Apparatus (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

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Citations (6)

Family Cites Families (19)

• 2010
  • 2010-08-14 DE DE102010034411.7A patent/DE102010034411B4/de not_active Expired - Fee Related
• 2011
  • 2011-08-11 WO PCT/EP2011/004035 patent/WO2012022447A1/de active Application Filing
  • 2011-08-11 US US13/816,876 patent/US9388784B2/en active Active
  • 2011-08-11 CN CN2011800398456A patent/CN103069152A/zh active Pending

Patent Citations (6)

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